Pneumatic tire for vehicle-wheels.



J. STEINBERG.

PNEUMATIG TIRE FOR VEHICLE WHEELS.

APPLICATION FILED PEB. 9, 1911.

Patented July 15, 1913.

u O WM CFI , of France,

UNITED STATES PATENTI OFFICE.

JACQUES STEINBERG, 07F PARIS, FRANCE.

PNEUMATIYC TIRE FOR VEHICLE-WHEELS.

Specication of Letters Patent.

. Patented July 15, 1913.

Application led February 9, 1911. Serial N o. 607,627.

To all 'whom t may concern:

Be it known that I, JACQUES STEINBERG, subject of thev Emperor ofRussia, and resident of 29 Rue Duret, Paris, in the Republicmanufacturer, have invented new and useful Improvements in Pneumatic o fwhich the following is a specification.

This invention relates for vehicle wheels of the type in which thelinner tube or air chamber repairs or seals itself automatically afterbeing. punctured by nails, pieces of glass or other obstaclesencountered on the road, for example, said air chamber being for thispurpose composed of several layers of rubber vulcanized to differentdegrees of hardness and of an interior layer which has not beenvulcanized at all and which remains in a pasty condition after heating*It has however been found difiicult to place an air chamber of this kindin the removable cover which serves to protect it and to'fx the cover onthe rim of the wheel owing to the great thickness of the air chamber andits relative stiffness.

The object of the present invention is to obviate this diiiiculty and tofacilitate the employment of self-sealing air chambers.

Now according to this invention the air chamber or inner tube is moldedor formed of several layers in the known manner and so that a ortion ofthe said inner tube which is a apted to lie close to the rim of thewheel, is formed with a depression or hollow extending all around thetube (that is to say the parts in the neighborhood of the smallestcircumference of the inner tube) while the'rest or greater part of theinner tube including its outer circumference is connected or attached byvulcanization or otherwise to the interior of the cover, the beads orthe like and the adjoining parts of the outer cover being left free.This arrangement permits the beads or edges of the cover to approacheach other suiiciently for passing easilyA between the inwardly turnededges or anges of the rim and for easily putting on the tire. When thetire is in its p ace it may be infiated so that the air chamber assumesa more or less circular to pneumatic tiresY form and forces the beadsinto the hookshaped parts of the rim. l

Figure 1 on the drawing isa transverse section of a tire made accordingto this invention, the airchamber being shown in the condition before itis inflated and with the beads asnear to each other as the valve willpermit in order that they may easily enter betweenlthe curved sides orflanges of the wheel rimf Fig. 2 is a transverse section showin the tiremounted on the wheel rim and Ain ated.

a denotes the self-repairing or self sealing air chamber. i

b is the cover, c the wheel rim, and d is the valve forination. The airchamber is by vulcanization stuck Vor caused to adhere to the cover forthe cumference, for instance to the extent of an arc marked 1, 2, 3,while t-he smaller and inner part of the circumference is unattached asshown.

The tires .made according to the present improvement may of coursebemounted on a rim forming an integral part of the wheel, or onaremovable' rim. The tires may also if desired `be provided with anon-slip or non-skid band o-r part of any kind soas to prevent sideslip, such for instance as the one shown conslsting of a crescent shapedpiece e of leather with rivets provided with projecting heads f.

Having now particularly descrlbed and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is A pneumatic tire comprising a cover and an air chambersecured to the cover at its tread portion, the said air chamber beingconcave on its inner face whereby the margins of the cover are normallydrawn toward each other when the tire is deflated for mounting on awheel rim. 1

In testimony, that I claim the foregoing as my invention, I have si edmy name in presence of two witnesses, this thirty first day of January1911.

JACQUES STEINBERG.

DEAN B. MASON,

ALCIDE FABE.

greater part of its cir-

